I Pelant et al 2008 J. Phys. D: Appl. Phys. 41 015103 doi:10.1088/0022-3727/41/1/015103
Ultrafast decay of femtosecond laser-induced grating in silicon-quantum-dot-based optical waveguides
I Pelant1,6, R Tomaši
nas2, V Sirutkaitis3, J Valenta4, T Ostatnický4, K Kůsová1 and R G Elliman5
Femtosecond transient laser-induced grating (LIG) experiments were performed in planar optical waveguides made of luminescent silicon quantum dots. The LIG was created by interference of two pulses from the frequency-doubled output of a Ti–sapphire laser (400 nm, 400 fs, 1 kHz). The LIG exhibits an extremely fast decay in time (several picoseconds) that was found to decrease with decreasing grating period. The standard models based on lateral carrier diffusion cannot explain this observation (this procedure yields an unrealistically high diffusion constant of 420 cm2 s−1). Instead, the results are explained by exciton diffusion and/or enhanced exciton radiative decay rate in a cavity represented by the periodically modulated planar waveguide (Purcell effect).
- PACS
-
78.47.-p Spectroscopy of solid state dynamics
- Subjects
-
Condensed matter: electrical, magnetic and optical
- Dates
-
Issue 1 (7 January 2008)
Received 17 September 2007, in final form 25 October 2007
Published 12 December 2007
-
Ultrafast decay of femtosecond laser-induced grating in silicon-quantum-dot-based optical waveguides
I Pelant et al 2008 J. Phys. D: Appl. Phys. 41 015103
-
A real-time assessment of measurement uncertainty in the experimental characterization of sprays
M R O Panão and A L N Moreira 2008 Meas. Sci. Technol. 19 095402
-
A proof-of-principle experiment of eliminating photon-loss errors in cluster states
Wei-Bo Gao et al 2008 New J. Phys. 10 055003
-
Reverse Monte Carlo modelling of amorphous Si3B3N7 using scattering and 15N NMR data
Markus Doerr and Christel M Marian 2007 J. Phys.: Condens. Matter 19 056201
-
BIPM comparison BIPM.RI(II)-K1.Sm-153 of activity measurements of the radionuclide 153Sm
G Ratel and C Michotte 2004 Metrologia 41 06012
-
Theory of cylindrical Langmuir probes in weakly ionized, non-thermal, stationary and moderately collisional plasmas
P M Bryant 2009 Plasma Sources Sci. Technol. 18 014013
-
Searching for new physics with ultrahigh energy cosmic rays
Floyd W Stecker and Sean T Scully 2009 New J. Phys. 11 085003
-
Spontaneous chiral symmetry breaking in QCD: a finite-size scaling study on the lattice
Leonardo Giusti and Silvia Necco JHEP04(2007)090
-
Final report of the bilateral comparison on the calibration of stainless steel mass standards between CENAM-Mexico and INTI-Argentina, SIM.M.M-S5 (SIM.7.44)
Luis Omar Becerra and Fernando Kornblit 2009 Metrologia 46 07012
-
Slow light in inhomogeneous and transverse fields
Leon Karpa and Martin Weitz 2008 New J. Phys. 10 045015
Users also read
What's this?- Comparative degradation of ZnO- and SnO2-based polycrystalline non-ohmic devices by current pulse stress
- Formation of stationary and transient spots on thermionic cathodes and its prevention
- An alloy liquid metal ion source for lithium